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Phase 3 · SQL for Data Analysis

Projects

Write 20 SQL Queries Against a Sample Database

Part of the Data Analyst Roadmap.

Summary

Deliberate practice reps — work through a public sample database (e.g. a Chinook or Northwind-style dataset) writing queries of increasing complexity.

How to Learn This

  • 1Download a free sample database and load it into a local SQL environment.
  • 2Write 20 questions ranging from basic SELECTs to multi-table joins with CTEs.
  • 3Check each answer against a second approach to confirm you got it right.

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